[s-cars] Weird boost issue - resolved (maybe?)

[Robert Myers]

Calvin, Teddy, et al,

Within the last two days (well, three now) I have had three different 
ECUs in the car, each with a different flavor of RS2 level 
software.  The problem persisted regardless of the ECU.  Trust me - 
the fault is not an ECU fault.  ;-)

You are right.  A bad solder joint in the ECU might well have been a 
possible cause but with multiple ECUs giving the same symptoms this 
appears to be pretty well eliminated as the source of the 
problem.  I'm hoping the problem is solved with the MAP hose renewal 
but only time will tell for sure.

At 12:47 AM 11/30/2005, calvinlc at earthlink.net wrote:

>*This message was transferred with a trial version of CommuniGate(tm) Pro*
>Teddy,
>
>What about a lose solder connection in the ECU?  Something that intermittent
>either sounds like a valve (i.e. WGFV) or electrical.
>
>--Calvin
>
>
>-----Original Message-----
>From: s-car-list-bounces at audifans.com
>[mailto:s-car-list-bounces at audifans.com]On Behalf Of Theodore Chen
>Sent: Tuesday, November 29, 2005 6:34 PM
>To: Robert Myers; s-car list
>Subject: Re: [s-cars] Weird boost issue - resolved (maybe?)
>
>
>bob,
>
>let's see how long that lasts.  every time i fiddled with
>the little hoses going to the moisture trap, the boost seemed
>to be better for a little while and i thought i had fixed it.
>
>i also pondered simply replacing the hoses.  with the
>symptoms my car has shown (going from low to high boost
>during the same acceleration run), i think it's more likely
>a boost sensing issue than a leak in the intake tract.  and
>since fiddling with the hoses to the moisture trap seemed to
>help, i think there may be a leak in the hoses themselves.
>i went so far as to visually inspect the moisture trap itself
>for cracks.
>
>the hose coming out of one side of the moisture trap to the
>ECU is clamped to stiff green plastic tubing.  i imagine that
>replacing this hose should be pretty straightforward.  but
>the other hose coming out of the moisture trap has a crimped
>connection at the other end.  does this end of the hose just
>slide onto a hose barb or something?  did you replace this
>one?
>
>i just want to make sure i know which hoses you're talking
>about.
>
>-teddy
>
>--- Robert Myers <Bob at chips-ur-s.com> wrote:
>
> >
> > I'm almost ashamed to tell.  My first thought as the cause of the
> > boost loss was a leak in the MAP line at the ECU/water trap
> > region.  Tore into it and found absolutely nothing suspicious.  Nope
> > - obviously no leaks there.  So what's the problem?  Sticking WG
> > valve?  Failed WGFV?  Well, working on the hoses and replacing
> > everything near the ECU will cost maybe $10 or so and a little of my
> > time and anything else will be over $100 so lets do some cheap
> > "repairs" before I start spending real money.  Thinking they were
> > alright and that I was probably wasting time and effort, I replaced
> > all the rubber portions of the MAP hose anyway and went for a test
> > drive.  YeeHaaaa!  Boost is back!
> >
> > I examined the pieces removed and see no faults but swapping it out
> > gave me boost so...  ????  Either there was a leak there that I still
> > can't find or I somehow accidentally "fixed" something else.
> >
> >
> > Bob
> > Http://Chips-Ur-S.com
> > _______________________________________________
> > S-CAR-List mailing list
> > S-CAR-List at audifans.com
> > http://www.audifans.com/mailman/listinfo/s-car-list
> >
>
>
>
>
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Bob
Http://Chips-Ur-S.com